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blue windflower, bog anemone, Oregon anemone, Oregon windflower, western wood anemone, western wood anenome

Edwards Plateau thimbleweed

Aerial shoots

5-30(-35) cm, from rhizomes, rhizomes horizontal.

(20-)30-50 cm, from tubers, tubers ±vertical.

Basal leaves

0-1, ternate;

petiole 4-20 cm;

terminal leaflet sessile to petiolulate, oblanceolate to rhombic, oblong, or ovate, 1-5(-6) × 0.7-2.5(-3.5) cm, base narrowly cuneate, margins sharply serrate on distal 1/2(-2/3), apex acuminate to acute, surfaces strigose to nearly glabrous;

lateral leaflets unlobed or 1x-lobed; ultimate lobes 0.4-10 mm wide.

3-6, 1-(nearly 2)-ternate;

petiole 8-15 cm;

terminal leaflet petiolulate, oblanceolate to obovate, 2-5 × 2-2.5 cm, base broadly cuneate, margins coarsely crenate on distal 1/2, apex obtuse to broadly acute, surfaces glabrous;

lateral leaflets 1x-lobed; ultimate lobes 4-8(-12) mm wide.

Inflorescences

1-flowered;

peduncle proximally glabrous, distally villous to pilose;

involucral bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct;

terminal leaflet sessile to petiolulate, oblanceolate to rhombic, oblong, or ovate, 1-8 × 0.8-3(-3.5) cm, bases narrowly cuneate to cuneate, margins crenate to serrate on distal 1/2(-2/3), apex acuminate to acute, surfaces abaxially glabrous or strigose, adaxially nearly glabrous to strigose;

lateral leaflets unlobed or 1x-lobed; ultimate lobes 0.5-10 mm wide.

(1-)2-5-flowered cymes;

peduncle proximally nearly glabrous, distally densely pubescent;

involucral bracts primarily 3, 2-tiered, simple, dissimilar to basal leaves, 3-cleft to pinnatifid, 2-5 cm, bases clasping, ±connate, margins coarsely crenate throughout, apex narrowly acute to acuminate, surfaces glabrous;

segments primarily 3, linear;

lateral segments unlobed or occasionally 1x-lobed; ultimate lobes 3-5 mm wide.

Flowers

sepals 5-7(-8), blue to purple, reddish, or purple to pink (rarely nearly white or abaxially reddish, violet, or marginally purple, adaxially white), ovate, oblong, or elliptic, 10-20 × 5-8(-10) mm, glabrous;

stamens 30-75.

sepals (8-)10-20, white to bluish, oblanceolate, 10-16 × 2-3 mm, sparsely hairy to nearly glabrous;

stamens 50-60.

Achenes

body oblong to ellipsoid, 4-5 × 1.5-2 mm, not winged, puberulous to pilose, rarely glabrous;

beak ±straight, (0.5-)1-1.5 mm, glabrous.

body orbiculate, flat, not winged, ±dull or varnished, woolly with long tuft of hairs at base, or glabrous;

beak straight, rarely curved, 0.5-1 mm, glabrous or sparsely villous proximally, not plumose.

Heads of achenes

nearly spheric;

pedicel (1.5-)2-5(-7) cm.

obconic to fusiform;

pedicel 10-20 cm.

2n

=16.

Anemone oregana

Anemone edwardsiana

Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
TX
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Anemone edwardsiana is found only in Texas on the Edwards Plateau.

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Stamens 30–60; abaxial color of sepals same as adaxial color; margins of involucral bracts similar to those of basal leaves.
var. oregana
1. Stamens 60–75; abaxial color of sepals different from adaxial color; margins of involucral bracts more coarsely serrate than those of basal leaves.
var. felix
1. Achenes woolly, ± dull.
var. edwardsiana
1. Achenes glabrous, varnished.
var. petraea
Source FNA vol. 3. FNA vol. 3.
Parent taxa Ranunculaceae > Anemone Ranunculaceae > Anemone
Sibling taxa
A. acutiloba, A. americana, A. berlandieri, A. canadensis, A. caroliniana, A. cylindrica, A. deltoidea, A. drummondii, A. edwardsiana, A. grayi, A. lancifolia, A. lyallii, A. multiceps, A. multifida, A. narcissiflora, A. occidentalis, A. okennonii, A. parviflora, A. patens, A. piperi, A. quinquefolia, A. richardsonii, A. tuberosa, A. virginiana
A. acutiloba, A. americana, A. berlandieri, A. canadensis, A. caroliniana, A. cylindrica, A. deltoidea, A. drummondii, A. grayi, A. lancifolia, A. lyallii, A. multiceps, A. multifida, A. narcissiflora, A. occidentalis, A. okennonii, A. oregana, A. parviflora, A. patens, A. piperi, A. quinquefolia, A. richardsonii, A. tuberosa, A. virginiana
Subordinate taxa
A. oregana var. felix, A. oregana var. oregana
A. edwardsiana var. edwardsiana, A. edwardsiana var. petraea
Name authority A. Gray: Proc. Amer. Acad. Arts 22: 308. (1887) Tharp: Amer. Midl. Naturalist 33: 669. (1945)
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